You guys can argue all day. Gorilla glass/ion-x is lousy for a watch crystal. its LOUSY. There is a reason every quality watch uses Sapphire. This shatter resistance difference is way over played and is getting old. Neither will shatter easily. The ion-x will however scratch and chip wayyyyyyyy easier. I would suspect in version 2 all models will use sapphire and I expect to see the iPhone move that way slowly as well.